Income Taxes - Provisions for Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Current:
Domestic	$ (6,899)	$ 11,028	$ 17,856
Foreign	25,561	65,132	106,575
Total current	18,662	76,160	124,431
Deferred:
Domestic	(8,617)	40,284	73,520
Foreign	8,715	(11,194)	(2,803)
Total deferred	98	29,090	70,717
Total provision for income taxes	18,760	105,250	195,148
Cash taxes paid	$ 75,819	$ 119,591	$ 139,724